Struct oc_wasm_safe::component::LastException

pub struct LastException<'invoker>(_);

An object that is able to retrieve detailed method call error information.

Certain errors, when returned from a method call (and only from a method call!), are accompanied by additional detailed error information which is only available until the next method call. A value of this type uses the 'invoker lifetime parameter to prevent additional method calls from being made until the caller has finished examining the detailed error information.

Implementations

impl<'invoker> LastException<'invoker>

pub fn message_length(&self) -> usize

Returns the length of the human-readable message for the error.

Panics

This function panics if the underlying syscall fails, because the only reasons it could fail should be impossible due to the type system.

pub fn message<'buf>(&self, buffer: &'buf mut [u8]) -> Result<&'buf str>

Returns the human-readable message for the error.

The message is written into buffer, and a string slice over the written text is returned.

Errors

• BufferTooShort is returned if buffer is not long enough to hold the error message.

Panics

This function panics if the underlying syscall fails for any reason other than BufferTooShort, because the only other reasons it could fail should be impossible due to the type system.

pub fn is_type(&self, class: &str) -> bool

Checks whether the Java exception underlying the error is of a certain type.

The class parameter must be the fully qualified name of a Java class (e.g. java.io.IOException). This function returns true if the exception that caused the error is class or a subclass thereof, or false if not.

Panics

This function panics if the underlying syscall fails, because the only reasons it could fail should be impossible due to the type system.

Trait Implementations

impl<'invoker> Clone for LastException<'invoker>

fn clone(&self) -> LastException<'invoker>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'invoker> Debug for LastException<'invoker>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'invoker> Hash for LastException<'invoker>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<'invoker> PartialEq<LastException<'invoker>> for LastException<'invoker>

fn eq(&self, other: &LastException<'invoker>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &LastException<'invoker>) -> bool

This method tests for !=.

impl<'invoker> Copy for LastException<'invoker>

impl<'invoker> Eq for LastException<'invoker>

impl<'invoker> StructuralEq for LastException<'invoker>

impl<'invoker> StructuralPartialEq for LastException<'invoker>